<template>
  <el-container class="home_container">
    <!-- 头部区域 -->
    <el-header>
        <div>
            <img src="../assets/homepic.jpg" alt="">
            <span>电商后台管理系统</span>
        </div>
        <el-button type="info" @click="logout">退出</el-button></el-header>
    <!-- 页面主体区 -->
    <el-container>
        <!-- 侧边栏 -->
        <el-aside :width="isCollapse ? '64px' : '200px'">
            <div class="toggle-button" @click="toggleCollapse">|||</div>
            <!-- 
                collapse：是否水平折叠收起菜单（仅在 mode 为 vertical 时可用）
                collapse-transition：是否开启折叠动画
                unique-opened：是否只保持一个子菜单的展开
                router="true":开启路由模式 
            -->
            <el-menu 
                background-color="rgb(199, 185, 199)"
                text-color="#rgb(0, 0, 0)"
                active-text-color="rgb(94, 57, 94)"
                :unique-opened="true"
                :collapse="isCollapse"
                :collapse-transition="false"
                :router="true"
                :default-active="activePath">
                <!-- 一级菜单 -->
                <el-submenu :index="item.id + ''" v-for="item in menulist" :key="item.id">
                    <!-- 一级菜单的模板区域 -->
                    <template slot="title">
                        <!-- 图标 -->
                        <i :class="iconsObj[item.id]"></i>
                        <!-- 文本 -->
                        <span>{{item.authName}}</span>
                    </template>


                    <!-- 二级菜单 -->
                        <!-- index 路由模式下找路径 -->
                    <el-menu-item :index="'/' + subItem.path" 
                    v-for="subItem in item.children" 
                    :key="subItem.id"
                    @click="saveNavState('/' + subItem.path)">
                        <template slot="title">
                            <!-- 图标 -->
                            <i class="el-icon-menu"></i>
                            <!-- 文本 -->
                            <span>{{subItem.authName}}</span>
                        </template>
                    </el-menu-item>
                </el-submenu>
            </el-menu>
        </el-aside>
        <!-- 主体 -->
        <el-main>
            <!-- 路由占位 -->
            <router-view></router-view>
        </el-main>
    </el-container>
  </el-container>
</template>

<script>
    export default {
        data(){
            return {
                // 左侧菜单数据
                menulist:[],
                iconsObj:{
                    '125':'iconfont icon-user',
                    '103':'iconfont icon-tijikongjian',
                    '101':'iconfont icon-shangpin',
                    '102':'iconfont icon-danju',
                    '145':'iconfont icon-baobiao',
                },
                // 是否折叠
                isCollapse: false,
                // 被激活的链接地址
                activePath:''
            }
        },
        created(){
            this.getMenuList()
            this.activePath = sessionStorage.getItem('activePath')
        },
        name:'HomeU',
        methods:{
            logout(){
                sessionStorage.clear();
                this.$router.push("/login")
            },
            // 获取所有的菜单
            async getMenuList(){
                const {data:res} = await this.$http.get('menus')
                if(res.meta.status !== 200) return this.$message.error(res.meta.msg)
                this.menulist = res.data
                // console.log(res);
            },
            // 点击按钮 切换菜单折叠
            toggleCollapse(){
                this.isCollapse = !this.isCollapse
            },
            // 保存链接激活状态
            saveNavState(activePath){
                sessionStorage.getItem('activePath',activePath)
                this.activePath = activePath
            }
        }
    }
</script>

<style scoped> 
.home_container{
    height: 100%;
}
.el-header{
    background-color: rgb(215, 200, 215);
    /* background-color: rgb(94, 57, 94); */
    display: flex;
    justify-content: space-between;
    padding-left: 0;
    align-items: center;
    color: rgb(0, 0, 0);
    font-size: 20px;
}
.el-header div{
    display: flex;
    align-items: center;
}
.el-header div img{
    width: 56px;
    height: 56px;
    border-radius: 50%;
}
.el-header div span{
    margin-left: 15px;
}
.el-aside{
    background-color: rgb(199, 185, 199);
}
.el-menu{
    border-right:none;
}
.el-main{
    background-color: #eaedf1;
}
.iconfont{
    margin-right: 10px;
}
.toggle-button{
    background-color: rgb(172, 125, 172);
    font-size: 10px;
    line-height: 24px;
    color: #fff;
    text-align: center;
    letter-spacing: 0.2em;
    cursor: pointer;
}
</style>